Safety-stop for trains.



J. V. RUND.

SAFETY STOP FOR TRAINS.

APPLICATION FILED rmzo. 1915.

Patented Jan. 18, 1916.

3 SHEETS-SHEET I.

THE COLUMBIA PLANOGRAPH c0., WASHINGTON, n. c.

. .RUND.

FOR TRAINS.

I ED FEB 20 1,168,337, Patented Jan.18, 1916.

v 3 SHEETSSHEET 2.

mm. W

I B 20. I9 l5.

Patented Jan. 18, 1916.

JOHN V. FUND, 015 PESOT'UM, ILLINOIS.

SAFETY-STOP ron TRAINS.

1,168,337 Specification of Letters Patent Patented Jan. 18, 1916.Application filed February 20, 1915. Serial No. 9,671.

To all 11 7mm it may concern: from the valve stem and, therefore,prevent Be it known that I, Jo -rn V. RUND, a opening of the valve byengagement of the citizen of the United States, residing at tripactuated mechanism with a trip. Pesotum, in the county of Champaign andIn this connection, a still further object State of Illinois, haveinvented certain new of my invention consists in so constructing anduseful Improvements in Safety-Stops and arranging the clutch head andclutch for Trains, of which the following is a releasing member thatthey will be auto--- specification. matically returned to normalposition, when My present invention relates to new and released,although the valve will still remain 1O useful improvements in safetyappliances 111' open position.

for railways and more particularly to that For this reason, a stillfurther object of class. of safety appliances intended to premyinvention consists in means for manually vent an engineer running atrain past a closing the valve.

danger signal, the primary object of my in- \Nith these and otherobjects in view, my

15 vention being the provision of means upon invention will be morefully described, illusa locomotive, engageable by a track obstacletrated in the accompanying drawings, then for successively closing thethrottle valve of specifically pointed out in the claims which I thelocomotive and applying the air brakes are attached to and form a partof this of the train. v application.

My improved safety appliance is intended In the drawings: Figure 1 is afrag- 5 to operate in connection with track obstacles mentary sideelevation of a conventional which may be thrown in or out of activepolocomotive, showing my safety appliance apsition and one object of myinvention conp i d hereto and also showing one o the sists in theprovision of a novel form of track obstacles in active position; Fig. 2is 2;; actuating member engageable with a track is a central,longitudinal sectional view of obstacle when the latter is in activeposition, the vent valve which I employ; Fig. 3 is a to operate througha cable or other suitable transverse sectional view taken on the lineconnection to open a vent valve included in 3-3 of Fig. 2, lookingin thedirection of the train pipe or a branch thereof. the arrows; Fig. 4: isa similar view on the a.) A still further object of my invention conline4-4 of Fig. 2, looking in the direction 5 sists in the provision of anovel form of vent v of the arrows; Fig. 5 is a similar view takenvalve, of the turn plug type, the valve being on the line 55 of Fig. 2,looking in the so arranged as to discharge train pipe air direction ofthe arrows; Fig. 6 is a perspecinto a throttle valve closing mechanismto tive view of one part of the clutch releasing actuate such mechanism,the air thus d1smember; Fig. 7 is a similar view of the other chargedsubsequently escaping from the part of the clutch releasing member.mechanism to vent the train pipe. Corresponding and like parts arereferred A still further object of my invention is: to in the followingdescription and indicated to so arrange the throttle valve closing inall the vlews of the drawings by the same 40 mechanism that the throttlevalve may be reference characters. manually manipulated in the usualmanner The vent valve, its construction, and manwithout opening the ventvalve referred to; ner of operation, must be understood to per- A stillfurther object of my invention mit appreciation of the operation of myconsists in providing means, whereby safety appliance as a whole and forthis manual closing of the throttle valve will reason I will describesuch valve, which is render the vent valve inoperative and thusindicated as a whole by the numeral 10, be-' prevent application of thebrakes, even fore describing the rest of the appliance. though a trackobstacle is passed. This valve includes a substantially cylindri- Inthis connection, a still further object of cal valve casing '11,enlarged at one en to 50 my invention consists in providing a ventprovide diametrically extending attaching valve of the turn plug typehaving a clutch ears 12to receive bolts or other suitable fasheadrotatable by the track obstacle actuated tening devices 13 by which itmay be semechanism to open the valve and further cured to the locomotiveat any suitable having a clutch releasing member operable point,preferably to the jacketing of the 55 by the throttle valve to disengagethe clutch boiler to extend at right angles thereto.

The oppo'si te 'e'nd of' the I valve easing 11 i in Fig. 2*and'the'provided with a", cenreduced as shown at 14 entire valve casing 1s trallongitudinal bore 15. This bore, which 18 uniform in diameterthroughthe-reduced portion of the valve casing, gradually n creasesI111" diameter from such shown, to provide a provide aycylindricalchamof the boreand valve seat, of the chamber and valve seat vided witha diametrically formed transverse off the body of-the valve casingand influid passage 23 which, in one position,,establlshes communicationbetween the inlet and outlet passages24and 25 formed in thebody anotherposition cutsoff such communication. The outer end of the-valve 22 isformed with a stop shoulder 26 to seat against the. shoulder l8'and ahelical spring27 isinterposed between the plug 2Q'and endof the valvetohold theyalve closely in its seat, the tension of the spring being adjusted; by the plug 20; and the 7 spring beingmaintained in central-positon 22 is provided, being tion' of the hand wheel by the'portion 21 ofsuch plug.

preferably formedint'egral with a cylindrical valve stem 28 which fitsclosely withinthe bore 15 of the valve casing and at itsfree' endextendsa considerabledistance beyond the reduced and of the casing.havingafreduced. terminal 29 to enga e in the socket 30 of. the hub ofhand wheel 31, this extension and socket being sonar-e n order thatturning of the hand Wheel 'may turn the valve stem. A

screw 32 prevents displacement of; the hand wheel from the valve'stem,and the hub-poras shown} is greater in diameter than thegreatestdiameter of the valve stem in order to. providean: an-- =n arsh uld r Iurrounding the free end of tlie; valve- "stem and en gaging. a gainsttheof the'valve casing. isa substantially cylin- Y dricafl clutch head34,thejva'lvestemireceiv- 55 ing bore 'of' which is enlarged at its outerend .toform an annular'chamber.

helical spring 33 of the hand wheel Q'Zder. 37 of the 35 to receive a36whichengages the shoulder and an internal shoulclutch head to normallyhold the. clutch head in engagement with the free end of the valvecasing, as shown in Fig. 2. end of the clutch head is provided with anannular flange or sleeve 38 which surrounds but is r he opposite orinner spaced from the free end portion of the valve casing 14,tershoulder 39 portion frusto-conical valve seat 16, while the oppositeend of thecasing is counterboredto .ber 17 in axial ahnement Wlth' acontinuation the meeting 7 7 providing. the inclined, circumfe'rentia1.top shoulder '18, The wall of the chamber, at "its oute'r end, is

slot being adabted to receive. tion of. a lever-42 which. ispivoted asshown at 43 in; the extreme'endportion of the exprojectstangentiallywith being provided at The valve adjacent end considera myshort of the 'annular formed by reducing the valve casing,andfth'e'r'eby chamber about the free end of the valve casingi The-bodyof the clutch head 34, as best shown in Figs. 2 and 3 of the drawings,is provided with a radially directed extension formediwithacircumferential slot 41, the

inner wall of which is, in effect, tangential to the main body of theclutchv head, this one end pnrtenslOiTaild which respect to the clutchhead, its free end,

head, with a pivot pin receiving opening 44. This slotted extension isformed upon; the upper face of the clutch head. and it will whichextends beyond'th'e clutch therefore be clear that downward pulling uponthe free end ofthe lever 42 will serve to partially rotate the clutchhead with respect to thevalve casing. or the valve stem unless such stemturns with the head.

,The val slot 45 to receive the-inne'r endsof projectable keys 46whichare normally held in proiected position by a helical spring4'7fse'ated in the intermediate portion of the slotand engaging theinner ends of. the keys. The outer ends otthe keys. are oppositelybeveled so that such ends, which normally seat in diametrically formed-Ilongitudinal keyways48'inthe clutch head have their outer faces planessubstantiallytangential to the valve stem to co-actwith the corresponding side walls of the keyways, saidwalls being also tangential to thevalve' stem. Because of this, turning'of the clutch head in onedirection will act "through theke'ys to turn the stem, while. turningof'th'e clutch head in the opposite directionwill merely force thekeysinto the slot of the shaft and so haveno'turning effect on the valvestem.

Mounted upon the reduced portion 14iof the valve'casing' between theclutch head and the shoulder 9', isfa clutch releasing b v f V a of theclutch head and which, in turn,'is

. with a flange or" sleeve 53"Which iit s closelyabout the reducedportion of the sockets formed in the op'p'os'edfacesof the clutch headandreleasingmember 50. It will of course be clear that this spring'54t'ends to holdtlie releasing member 50' and ve stem is formed with adiametric' turned in one direction,

clutch head in a predetermined angular position with respect to eachother and to return such parts to that position if either one is movedout of it.

The co-acting clutch releasing member 51 includes a collar portion 56which fits about the valve casing and engages against the adjacent faceof the collar 52. This collar 56 is provided with an annular flange orsleeve 57 which engages, at its free end, against the shoulder 39 of thevalve casing to provide an annular chamber about the valve casing toreceive a helical spring 58, the ends of which seat in sockets 59 formedin the valve casing and in the body proper of the releasing member 51.This spring performs the same function with respect to the releasingmember 51 and valve casing that the spring 5 1 does with respect to theclutch head and releasing member 50.

The releasing member 50 has formed at diametrically opposite sides ofits otherwise plane surfaced inner end, reversely formed, peripherallyextending cams 60 of less width than the thickness of the walls of theclutch releasing members, whereby they may normally seat wholly withincorrespondingly located and shaped cam recesses 61 formed in theabutting end face and inner face of the clutch releasing member 51. Thereleasing member 50 is provided interiorly with diametrically disposed,longitudinally extending keyways 62 which preferably, are in alinementwith and extend into the cams 60 in order to give them added length andthe valve casing is provided with keys 63 which seat in these keyways,the keys being so fitted in the keyways as to permit longitudinalmovement of the clutch releasing member 50 but to hold it againstturning movement.

The keyways 18, previously mentioned, communicate at their inner endswith an annular recess 6&1, whereby the clutch head at may be turned ineither direction without turning the valve stem, if it has previouslybeen moved longitudinally of the valve stem toward the hand wheel asufficient distance to position the outer ends of the keys 4.6 in thechamber 6 1. It will therefore be clear that if the clutch releasingmember 51 be movement in the other direction, at all times, beingprevented by the cams 60 and cam recesses 61, the coaction between thecams and cam recesses will, inasmuch as the releasing member 50 is heldagainst turning movement, force such releasing member toward the freeend of the valve stem and therefore force the clutch head toward thehand wheel to disengage it from the valve stem by bringing its keys 16into the annular chamber 6% of the clutch head. The collar portion 56 ofthe releasing member 51 is provided with an upstanding impact receivingshoulder or lug 65 by means of which such member may be partially turnedto accomplish the above releasing of the clutch head.

As previously mentioned, the above described valve is secured to alocomotive and a pipe 66 leads from the train pipe of the air brakesystem to the port 25 of the valve, while a pipe 67 leads from the port24 of the valve into one end of a cylinder 68. This cylinder is mountedat any suitable point upon the locomotive and is provided adjacent thatend opposite the connection with the pipe 67 with a vent port 69. Apiston 70 is mounted in the cylinder and capable, under train pipepressure from the valve 10 and pipe 67, of movement to a position pastthe vent port 69, whereby the train pipe may be vented through suchport. This piston has a piston rod 71, the free end of which isconnected to a link 72 having a laterally directed terminal 7 3. A link7 a is slidably mounted in this terminal and provided with a head 75,whereby movement of the link is in one direction, will draw the piston70 toward the pipe 67 and movement in the opposite direction will haveno effect upon the piston. This rod 7% or link is reciprocally mountedin a bearing 76 and at its free end is connected to another link 7 7which, at its free end, is pivotally connected at the point of pivotalconnection of the toggle lever arms 78. One of these toggle lever armsis connected to the throttle valve 79 and the other to latch structure80, the pawl of which is operated by a link 81 connecting it and thehandle. The throttle valve lever is pivotally mounted at one end, asshown at 83 in the usual manner and connected intermediate its lengthwith a link 8% leading to the throttle valve, the pawl of the latchcotipcrating with a toothed segment 85 as is usual in such valve leverconstruction. The link 7%, which is held against turning movementbecause of its manner of connection with the link 77, is provided with ashoulder or lu 86 adapted, when the throttle valve le-- ver is moved toclosed position, to engage against the shoulder or lug 65 of the clutchreleasing member to turn such member a sufficient distance to free theclutch head from the valve stem 28.

A cable 87 or other suitable flexible connection is secured at one endto the free end of the lever 12, is passed downwardly about a pulley 88and over a pulley 89 and connected at its opposite end to the upper endof atrip lever 90. This trip lever is pivotally mounted intermediate itslength upon a bracket 92 supported at any suitable part of thelocomotive, preferably upon the cross head guides 98 and is provided atits lower end with a roller 94. The cable 87, immediately above theupper end of the lever '90, is passed between a pair of spaced pulthehandle 82 of a hand .fully illustrated in another.

n either direction, a

leys 95 which serve as guides for the cable irrespective of in whichdirection the lever 90 may be swung. It will of course be apparent thatswinging of the lever 90 in either direction will act through the cableto swing the lever 42 and therefore open the .valve 22 unless fromhorizontal to vertical position, the latter being the position shown,any suitable mechanism, not shown, being provided for this purpose. Asthis type of obstacle is patent granted to me on the 18th day ofSeptember, 1914, and bearing the N 0. 1,115,579, any further descriptionof its construction and method of operation is believed tobeunnecessary.

, In operation, assuming that a locomotive equipped with my safetyappliance passes track obstacle in raised or active position, the lever90 will be swung through engagement of the roller 94 with the obstacle.This swinging of the lever, ir-

res aective of the operation of such swinging,

Wlll act through the cable 87 to turn the clutch head 84 and thereforeturn the valve 22 to open position providing the clutch head is lockedto the valve stem as is normally the case. As soon as a sutlicientdistance to free the lever 90 from the obstacle, the spring 54: of thevalve structure will automatically return the clutch head to normalposition, this being permitted, due to the inclined faces of the keys 46and of the keywaysAS, the valve still remaining open. Undertheseconditions, air will pass from the train pipe 66 through the valve10 andpipe 67 into the cylinder 68, forcing the piston 70 toward the fartherend of the cylinder. This movement of the piston acts'through the links71, 72 and 74% torelease the hand latch of the throttle valve lever andswing the throttle valve lever to closed position. At the time that thislever reaches closed position, the piston 70 will have passed the ventpor't'69 and air will be.ventedfrom the train pipe to apply the airbrakes of the train; I ltis of course true that the lug 86 is byftlie"same movement brought into engagement with the impact receiving lug orshoulder of the clutch releasing member 51, causing the forcing of theclutch head to inactive or released position. This, however, has noeffect upon the valve, under these circumstances, and the valve can onlvbe closed bv manual manipulation of the hand wheel 31. It will of coursebe clear that the engineer may again open the throttle valve by theusual manipua train has moved closing of the throttle valve;

lation of the throttle valve lever anscl that such opening of thethrottle valve will release the clutch releasing member and thereby.again lock the clutch to the valve stem. On the other hand, if theengineer sees a danger signal set and; shuts-the throttle valve leverbefore reaching the trackjobstacle, such movement of the lever willoperate the clutch releasing member to free the clutch from the valvestem and swinging of the clutch head in the manner previously describedwill, under those circumstances, have no effect upon the valve whichwill remain closed. For this reason, if the .en-

gineer sees the danger signal in time" and an emergency applicat onofwishes to avoid the brakes, he can readily do so by closing the throttlevalve to stop the train.

It should be noted that both the springs 27 and 36 tend to hold thefrusto-conical plug valve 22 firmly to its seat and further that thespring 36 holds the clutch head in close engagement with the clutchreleasing device 4L9 and returns the clutch head to normal positionafter opening of the throttle valve, and consequent release of thereleasing member 51 ofthe clutch releasingdevice. The springs-54L and 68tend to constantly maintain the members ofthe clutch releasing deviceand the clutch head in proper angular position with respect .to eachother. t H

Having thus described the invention, what is claimed as new is: v v

In a safety appliance for trains, the combination with a throttle valveand its lever and a train pipe, of a vent valve for the train pipe, atclutch-head normally connected with the valve and forming an op eratinmeans therefor track obstacle o)- t; 7

erated means'for turning the clutch head to open the valve, and meansfor releasing the clutch head, whereby its turning'will not open thevalve. 1

2. In a safety appliance for trains, the combination with a throttlevalve and its lever and atrain pipe, of avent valve for the train pipe,a clutch head normallyconnected with the valve. and forming an operatingmeans therefor,"tracl' o'bstacle operated means for turning the clutch;headfto open the valve. anjd means for releasing. the clutch head,whereby its" turning wil'l'not open the valve, said. means operatingupon .5. In combination with a throttle valve, its lever and a trainpipe, of a *en't valve in'thetrain pipe, means operable by opening ofthe vent valve for closing the throttle valve, a clutch? head normallyconnected with the vent valve and longitudinally movable to free it ofsuch connection, track obstacle operated means for turning the clutchheadto open the vent valve, 0 and means. for moving I the.

av safety appliance for trams, the

free it from said means the trottle valve and longitudinally movable tofreeit of such connection, track obstacle operated means for turning theclutch head to open the vent valve, and means for moving the clutch headlongitudinally to free it from connection with the vent valve, saidmeans being operable by movement of the throttle lever to close thethrottle valve, and including co-acting cam members, one of which ismovable upon swinging of the throttle valve lever to move the other andcause it to force the clutch head out of connection with the vent valve.

In a safety appliance for trains, the combination with a throttle valve,its lever and a train pipe, of a valve casing having ports communicatingwith train pipe sections, a turn plug valve mounted in the easing, arevoluble stem for the valve, a clutch head mounted upon the stem andmovable longitudinally thereof, means oo-acting be tween the stem andthe clutch head to lock them for common turning movement in one positionof the head on the stem and to leave the head free for independentturning movement when in another position on the stem, means normallyholding the head in the former position, means operable by turning ofthe throttle valve lever to close the throttle valve for moving the headto the other position, and track obstacle operated means for turning thehead irrespective 0 its position.

6. In a safety appliance for trains, the combination with a throttlevalve, its lever and a train pipe, of a valve casing having portscommunicating with train pipe sections, a turn plug valve mounted in thecasing, a revoluble stem for the valve, a clutch head mounted upon thestem and movable longitudinally thereof, means co-acting between thestem and the clutch head to lock them for common turning movement in oneposition of the head on the stem and to leave the head free forindependent turning movement when in another position on the stem, meansnormally holding the head in the former position, means operable byturning of the throttle valve lever to close the throttle valve formoving the head to the other position, and track obstacle operated meansfor turning the head irrespective of Copies of this patent may beobtained for five cents each, by addressing its position, said throttlelever operated means including a cam sleeve mounted on the valve casingfor longitudinal movement and engaging the clutch head, whereby the twomove together, a second cam sleeve mounted on the valve casing forturning movement to move the first cam member longitudinally, andoperative connection between the second sleeve and throttle valve lever.

7. In a safety appliance for trains, the combination with a train line,of a vent valve interposed in the train line including a valve casing, aturn plug valve mounted in the casing and controlling venting of airtherefrom, an operating head reciprocally mounted on the valve plug,keys carried by the valve plug to lockingly engage the head in oneposition thereof, means for normally holding the head in such position,and a pair of co-acting cam sleeves mounted on the casing and ope "ableto move the operating head to its other position.

8. In a safety appliance for trains, the combination with a train line,of a vent valve interposed in the train line including a valve casing, aturn plug valve mounted in the casing and controlling venting of airtherefrom, an operating head reciprocally mounted on the valve plug,keys carried by the valve plug to loclringly engage the head in oneposition thereof, means for normally holding the head in such position,a pair of co-acting cam sleeves mounted on the casing and operable tomove the operating head to its other position, and means normallyholding the cam sleeves in inoperative position.

9. In a safety appliance for trains, the combination with a train line,valve interposed in the train line, including a valve casing, a turnplug valve mounted in the casing and controlling venting of airtherefrom, an operating head reciprocally mounted on the valve plug,keys carried by the valve plug to lockingly engage the head in oneposition thereof, means for normally holding the head in such position,a pair of co-aoting cam sleeves mounted on the casing and operable tomove the operating head to its other position, and means normallyholding the cam sleeves 1n inoperative position, said means includinghelical springs surrounding the casing within the sleeves with one endof each spring engaging its sleeve and the other end of each springengaging the casing.

In testimony whereof I affix my signature 1n presence of two witnesses.

JOHN V. RUND. W'itnesses S. N. Evans, J. J. RUND.

the Commissioner of Patents.

Washington, D. C.

of a vent

